* Added new CreateAccount method which properly overwrites previous
  accounts (excluding balance)
* Fixed block tests (100% success)

29da5ea add JS block test example as state test
04108e0 Merge remote-tracking branch 'origin' into develop
6da7f35 JS failures
22b5dfc stQuadraticComplexity Refill with latest develop
c97bf26 Memory / Solidity Test Update

git-subtree-dir: tests/files
git-subtree-split: 29da5ea53ab36d74bd3c0712337168086cabfb8d

Update Go bootnode address

Correct gas limit validation according to new algorithm

* Use absolute value of (block's gas limit) - (parent's gas limit)
  in comparison with diff limit.
* Ensure the diff is strictly smaller than the allowed size.

Conflicts:
	rpc/api.go

RPC Args

* CALLDATA use getData
* removed old context get range value
* removed casting big => int for some cases
* pc now big int #457

Minor fix

Update README.md